unknown plant

unknown plant

Observation - unknown plant - UK and Ireland. Description: Photographed this small plant growing in a marsh type ground next to a pond, its about 6inches tall thought it was red clover or a small scabious plant but leaf structure does not fit, can anyone help ? thank you.

Photographed this small plant growing in a marsh type ground next to a pond, its about 6inches tall thought it was red clover or a small scabious plant but leaf structure does not fit, can anyone help ? thank you.